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Taya2010 [7]
2 years ago
9

I'll give u full brainlist if u do this!

Mathematics
1 answer:
alex41 [277]2 years ago
6 0

Answer:

a. 54.75

b. 2.64

Step-by-step explanation:

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How do I solve this? It says solve each right angle and then to round answers to the nearest tenth.
mariarad [96]

Answer:

19.2

Step-by-step explanation:

Add 12 squared to 15 squared(144+225)

Square root the answer(\sqrt{369})

Round to the nearest tenth(19.209)

7 0
3 years ago
A survey of 1,562 randomly selected adults showed that 522 of them have heard of a new electronic reader. The accompanying techn
tester [92]

Answer:

a) We want to test the claim that 35​% of adults have heard of the new electronic reader, then the system of hypothesis are.:  

Null hypothesis:p=0.35  

Alternative hypothesis:p \neq 0.35  

And is a two tailed test

b) z=\frac{0.334 -0.35}{\sqrt{\frac{0.35(1-0.35)}{1562}}}=-1.326  

c) p_v =2*P(z  

d) Null hypothesis:p=0.35  

e) Fail to reject the null hypothesis because the P-value is greater than the significance level, alpha.

Step-by-step explanation:

Information provided

n=1562 represent the random sample selected

X=522 represent the people who have heard of a new electronic reader

\hat p=\frac{522}{1562}=0.334 estimated proportion of people who have heard of a new electronic reader

p_o=0.35 is the value to verify

\alpha=0.05 represent the significance level

z would represent the statistic

p_v represent the p value

Part a

We want to test the claim that 35​% of adults have heard of the new electronic reader, then the system of hypothesis are.:  

Null hypothesis:p=0.35  

Alternative hypothesis:p \neq 0.35  

And is a two tailed test

Part b

The statistic for this case is given :

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info given we got:

z=\frac{0.334 -0.35}{\sqrt{\frac{0.35(1-0.35)}{1562}}}=-1.326  

Part c

We can calculate the p value using the laternative hypothesis with the following probability:

p_v =2*P(z  

Part d

The null hypothesis for this case would be:

Null hypothesis:p=0.35  

Part e

The best conclusion for this case would be:

Fail to reject the null hypothesis because the P-value is greater than the significance level, alpha.

5 0
3 years ago
A train travels 75 miles in 55 minutes what is the average speed in miles per minute
nekit [7.7K]

Answer:

1.36 miles per min

Step-by-step explanation:

5 0
3 years ago
Where is the function increasing?<br> A)1 B)3&lt; X C)-infinity &lt; x &lt; 1<br> D)-infinity
eduard

Answer:

A) 1

Step-by-step explanation:

Given:

A graph of a function.

When we analyze the given graph, it is of a <em>parabola</em>.

To find:

The interval of values of x where the function is increasing.

Solution:

First of all, let us learn about the meaning of increasing and decreasing functions.

1. A function y=f(x) is known as increasing  in an interval a when

Value of y keeps on increasing when we move from the value of x from a to b.

2. A function y=f(x) is known as decreasing  in an interval a when

Value of y keeps on decreasing when we move from the value of x from a to b.

On analyzing the given graph , we can see that the graph is decreasing on the interval: -\infty

and is increasing on the interval: 1

When we choose from the options,

The correct answer is option A) 1

6 0
2 years ago
What is the value of x in the equation below? 4(x + 3) = 9x + 16 + 3x
creativ13 [48]

Answer:

x = -1/2

Step-by-step explanation:

4(x + 3) = 9x + 16 + 3x

Distribute the 4

4x +12 = 9x+16+3x

Combine like terms

4x+12 = 12x+16

Subtract 4x

4x-4x+12 = 12x-4x+16

12 = 8x+16

Subtract 16

12-16 = 8x+16-16

-4 =8x

Divide by 8

-4/8 =8x/8

-1/2 =x

3 0
2 years ago
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